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invisible, short-wave radiation emitted by the sun, which can cause cancer in humans.
the last part of the mammalian large intestine, which stores faeces until it can be expelled...
the forming new plants asexually (without the production of seeds or spores).
a small, corky pore or narrow line on the surface of the stem of a woody plant that allows the...
the dramatic increases in crop production around the world from the second half of the twentieth...